Israel froze peace moves after a Palestinian suicide bombing on February 25.

"The Israeli delay in implementing the commitments constitutes a threat to what we have succeeded in achieving and gives excuses to those who are plotting to sabotage the entire peace process," Mr Abbas said in a copy of the speech obtained in advance by Reuters.

Hopes for Middle East peace have risen since Mr Abbas replaced the late Yasser Arafat and agreed the truce.

But after the bombing killed five people in Tel Aviv, Israel put a halt to a planned handover of West Bank cities and prisoner releases.

Mr Sharon said Mr Abbas had to take firm action against militant groups.

He was due to meet Israeli Defence Minister Shaul Mofaz later today for the highest-level talks since the bombing to discuss the transfer of the first of five West Bank towns to Palestinian security control.

In his speech, Mr Abbas reiterated the Palestinian demand for political negotiations for statehood alongside efforts to end violence.

Israel says that there can be no talks on fundamental issues until militant groups are dismantled.

Mr Abbas also emphasised that Palestinians would not stand for an increase in Jewish settlements in the West Bank as a result of Mr Sharon's planned withdrawal from the Gaza Strip this summer.

Palestinians want both occupied territories for a state.

"We also reiterate our total rejection of the idea of a provisional state," Mr Abbas said, reacting to a suggestion floated by some Israelis for a halfway house before full statehood.